武陵山大木山自然保护区红豆杉群落优势乔木种群生态位和种间联结

应用Pearson相关系数和Spearman秩相关系数检验。对武陵山大木山自然保护区红豆杉群落内13个优势乔木种群的种间关联（或相关）性进行研究，并对13个优势乔木种群生态位宽度、生态位重叠进行分析。结果表明，红豆杉种群对资源的利用能力较强，生态位宽度值较大：红豆杉与其他物种生态特性差异较大，生态位重叠值较低；群落内各种群间关系的相对独立性较弱，红豆杉种群与其他物种大多呈正相关关系。生态位宽度值大的物种，与其他物种的生态位重叠值一般较大；生态位重叠值较大的物种对，其种间联结一般也较显著。

Niches and Interspecific Association of Dominant Tree Populations of Taxus chinensis in Wuling Damu Mountain Nature Reserve

Using the Pearson correlation coefficient and Spearman rank correlation coefficient, the interspecific association of 13 species in different communities in Wuling Damu Mountain Nature Reserve were investigated, and the niche breadth and niche overlap of 13 species were studied. The results showed that the utilization ability of resources of Taxus chinensis community was relatively stronger, and the value of niche breadth was relatively larger. Comparing with other species, Taxus chinensis had a difference on ecological characteristics, and the value of niche overlap was relatively smaller. Besides, the independence between each population was relatively weaker, and the Taxus chinensis community had a positive correlation with other species. The species, which had a larger value of niche breadth, had a larger value of niche overlap. Moreover, the species, which had a larger value of niche overlap, showed a great significantly difference in interspecific ssociation.